Improvement in furnaces for steam-engines



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[encuen WYNEANDWILLIAM' Mao GROVE, or DENNIsoN, onto.

l l Letters Patent No. 105,617, tlatecl July `19, 1870.

1MPnovmvrnrrry :1v` rURNAens non sTnAMnNGINEs;

` Thechedule referred to these Letters-Patent and making part of t'helsame.

To all 'whom @t may concern: p

Be it known that we, GEORGEMVYNE and WIL- `LIAM MAC GROVE, of Dennison, county of Tuscarawas and State 'of Ohio, have invented a certain new and `improved Steam-Engine Furnace for Burning Smoke; 'and we do hereby declare that the following is` a full, clear, and `complete descriptionofthe same,

reference being` had to lthe accompanying drawing making part ot'gthis specification, lin which l drawing- Figure l isa side elevation of a steam-boiler.

Figure 2, a vertical section. l l Figure 3, an end view of the'boiler and furnace.

4Figure f1, a perspective `View of the inside of the" y steam-boiler,"and to causel the cold air entering the l furnace-door to beheated and brought in contact with `the eliminated gases andsmoke before being impiuged upon the roof, sides, or fines of thefurnace. These `devices are not in themselves, separatelyconsidered,

heldasnew, but the combination thereof, as herein' ,'flhefurnace issupplied with a currentof cold `air Vf rpinthe-outside by pipes"` r conductors, `thereby aidl ing inthe combustion of fuel, smoke, Src; 1

i VA representsan ordinary tubular boiler, and

B the fire-box or furnace in connection therewith, and which is or may be constructed in the ordinary way.

the end of the boiler, is an arched l roofrror y deflector, 0, figs. 2 and 3,\the`purpose of vwhich is to throw the smoke and gas generated by the consuming coal .back over and upon` the iii-e, thereby preventing it @from escaping' directly intothe fines of the boiler. g

'lhe smoke and gas thus-thrownbacki over the' `burning coals'areignited and burned, thereby adding to the heat of the furnace, and `the consequent .more

rapid `'generation ofisteam. l y By this'means none or `but'little smoke escapes to the outside, as nearly allthe combustible matter it `contains is consumed, togetherwith the gas, by thus bcingthrown back' over and upon the bed of 'burning fuel, thereby saving "largely inthe consumption of `wood and coal. l C p The door of the furhaccisprovided with a deiiectoror shielihH, by means of which the air entering the door is directed down in contact with the generated gases and smoke before it is"brought in contact with thejlues and vcrown-sheet of the boiler. `This prevents not only alcold current of air from being "impinged upon the rboiler-plates` on openingthedooxgbut eauses Van additionalelsnpplyto aid in consuming theincreased `quantity of ysmoke and gases `caused by the introduction of new fuel. Thus the y shield. aids in directing a new supply of air at the important moment when needed, and, at the same time, prevents it from being impinged upon the sideplates of the boiler before being heated, as it islwell known that the cold air through thev door, when directly thrown upon the plates and lues A"of the boiler,

rapidly lowers the condition of steam in the boiler, to

which there are serious objections.

.In concert with `the preceding, increased draught and consumption of smoke is further effected by the side drafts or air-pipes E, figs. 2 and 3, which, as will be seen, are located along'the sides of the furnace 'above the tire.

Said pipes open-upon the under side and discharge into the space, immediately over the bed of coalsa current of air from the outside, with which the tubescommunicate by their passing through the back of the furnace, and terminating with a funnel-shaped mouth, F, iig. 1.

By thus supplying to the partially consuming smoke and gas a full proportion of oxygen, amore complete consumption ofthe smoke is effected and the draught of the entire furnace augmented, so that a more Vimmediate and intensitied heat is supplied to the boiler for the generation of steam. p c

It is well known A to engineers that on opening the furnace doors for the purpose of throwing in fuel,

that a, large amount of cold air is admitted into the furnace, which flows back upon theend of the boiler,

thereby immediately reducing' its temperature many degrees and more; especially is this .the ease in very cold weather'.`

To prevent this is the purpose ot' the deflector or l shield H referred to, which, as will be seen, covers the` Partially over thefurnace, and immediately under door upon the inside. Hence, when the door. is opened,the cold air rushing therein strikes upon the" y shield or deliector, and is at once deieoted down uponv the re and heated before reaching the end of the boiler.

l j By this means the temperature of the boiler re-` mains wit-hout material change during the time of supplying the lire with fresh fuel, and, therefore, no f loss of heat occurs tothe boiler, nor injnry,conse quent of a sudden strainexerted thereon occasioned by its unequal temperature producing sudden and unequal contraction.

v g Claim'.

What I claim as my invention, and desireto secure by Letters Patent, .isf y c The arrangementof the air-pipes E, anddeiiector C, in combination with the shield and furnaceconjointly, for the purposes set. forth, and in the manner substantially described.

.` GEO. M. WYN E.

` y WM. MAGA GROVE.

Witnesses:

W. H: Btmmnen `OLIVE A. MILONE. 

